CN103544848A - Method and device for judging parking space states on basis of geomagnetic detection for multiple parking spaces - Google Patents
Method and device for judging parking space states on basis of geomagnetic detection for multiple parking spaces Download PDFInfo
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- CN103544848A CN103544848A CN201310454397.7A CN201310454397A CN103544848A CN 103544848 A CN103544848 A CN 103544848A CN 201310454397 A CN201310454397 A CN 201310454397A CN 103544848 A CN103544848 A CN 103544848A
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Abstract
The invention discloses a method and a device for judging parking space states on the basis of geomagnetic detection for multiple parking spaces. The method includes steps of acquiring an average sampled value of one or a plurality of parking spaces adjacent to a certain parking space when an average sampled value of one or a plurality of sampled values of the certain parking space is larger than an average sampled value threshold; comparing the average sampled value of the certain parking space to the average sampled value of the adjacent parking spaces to determine whether a parking space state of the certain parking space is changed or not. The sampled values of the certain parking space are acquired in a judgment period. The method and the device have the advantages that geomagnetic data of the parking spaces adjacent to the certain parking space are changed, and change of the geomagnetic data of the parking spaces adjacent to the certain parking space is compared to change of geomagnetic data of the certain parking space, so that whether the parking space state of the certain parking space is changed or not can be determined, the misjudgment rate of the change of the parking space state of the certain parking space can be effectively reduced owing to the mode, and the accuracy of judgment on the parking space state can be improved.
Description
Technical field
The present invention relates to parking stall measure field, relate in particular to a kind of parking space state decision method and device based on many parking stalls geomagnetism detecting.
Background technology
Along with socioeconomic sustainable development and industrial adjustment, the quantity of motor vehicle and use are more and more frequent, for parking lot demand, grow with each passing day especially, and " parking difficulty " has been with great inconvenience to especially people's life.Relevant enquiry data shows, motorist has reached 12%-15% for the ratio that repeatedly cruising of finding that vacant parking stall carries out in parking lot occupied road traffic flow, that is to say, motorist has consumed a large amount of time and efforts for finding parking stall, and has taken a large amount of road traffic resources.
In the prior art, most parking lot is all to carry out parking space state detection based on video and image processing techniques, and wherein, described parking space state includes car state or without car state.But be subject to the impact of network or other factors, this parking stall measure technology is also unreliable, easily occurs erroneous judgement or the phenomenon of failing to judge, and the ability of recovery data is poor.
Based on the problems referred to above, a kind of method of utilizing parking stall geomagnetism detecting parking space state has been proposed.Due to vehicle turnover parking stall time parking stall geomagnetic data is had a certain impact, so, the geomagnetic data variation that can cause according to vehicles while passing parking stall detects parking space state,, utilize default detection threshold to judge the variable quantity of the geomagnetic data of parking stall, when the variable quantity of geomagnetic data surpasses this detection threshold, judgement has car turnover.But the parking stall that this technology relates to takies decision method, the court verdict that affect parking space state is understood in arranging of detection threshold, causes the erroneous judgement that parking space state is changed.For example: when presetting less detection threshold, be that geomagnetic data slightly changes and just can cause that the variable quantity of this geomagnetic data surpasses detection threshold, thereby changing, the geomagnetic data of this parking stall causing for the vehicles while passing of adjacent parking stall can not accurately distinguish, when the geomagnetic data that can be created in adjacent parking stall changes, this parking stall is also simultaneously magnetic data variation without vehicles while passing in the situation that, and then cause the variation of parking space state, misjudge; When default larger detection threshold, so when there is vehicles while passing this parking stall, but the geomagnetic data deficient change that this vehicle causes to be when surpassing detection threshold, and the parking space state of this parking stall can not change, and fails to judge.
Summary of the invention
The problem arranging due to detection threshold for overcoming the method for utilizing parking stall geomagnetism detecting parking space state of prior art existence, the parking space state misjudgement that causes the geomagnetic data that can not distinguish this parking stall that adjacent parking stall causes to change and cause, or the parking space state the causing defect of failing to judge, fundamental purpose of the present invention is to provide a kind of parking space state decision method and device based on many parking stalls geomagnetism detecting, improves the accuracy of parking space state judgement, to avoid parking space state to fail to judge and adjacent parking space state changes the parking space state that disturbs and occur and judges disconnected problem by accident to solve.
In order to solve the problems of the technologies described above, the object of the invention is to be achieved through the following technical solutions:
The invention provides a kind of parking space state decision method based on many parking stalls geomagnetism detecting, comprise the following steps: when the sampling average of one or more sampled values of the parking stall gathering is greater than sampling average thresholding, obtain the sampling average of one or more adjacent parking stalls of described parking stall within the judgement cycle; The sampling average of the sampling average of described parking stall and described one or more adjacent parking stalls is compared, to determine whether the parking space state of described parking stall change has occurred.
The present invention also provides a kind of parking space state judgment device based on many parking stalls geomagnetism detecting, comprise: while being greater than sampling average thresholding for the sampling average of one or more sampled values of the parking stall when gathering within the judgement cycle, obtain the module of sampling average of one or more adjacent parking stalls of described parking stall; For the sampling average of the sampling average of described parking stall and described one or more adjacent parking stalls is compared, to determine whether the parking space state of described parking stall the module changing has occurred.
Compared with prior art, technical scheme according to the present invention has following beneficial effect:
The present invention is by changing the geomagnetic data of adjacent one or more parking stalls, this parking stall, change and compare with this parking stall geomagnetic data, and then whether the parking space state of determining this parking stall there is change, can effectively reduce in this way the False Rate that this parking space state is changed, improve the accuracy of parking space state judgement.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, forms the application's a part, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the process flow diagram of the parking space state decision method based on many parking stalls geomagnetism detecting according to an embodiment of the invention;
Fig. 2 is the detail flowchart of the parking space state decision method based on many parking stalls geomagnetism detecting according to an embodiment of the invention;
Fig. 3 is that parking stall geomagnetic sensor arranges schematic diagram according to an embodiment of the invention.
Embodiment
Main thought of the present invention is, default rational detection threshold, and for example, default less detection threshold, reduces failing to judge that parking space state is changed.And, when the variable quantity of the geomagnetic data of this parking stall (parking stall) surpasses detection threshold, the variable quantity of the geomagnetic data of a plurality of parking stalls that the variable quantity of the geomagnetic data of this parking stall is adjacent compares, the variation of this parking stall geomagnetic data of getting rid of the geomagnetic data variation of adjacent parking stall and causing, and then judge this parking stall and whether parking space state occurs change, reduced the erroneous judgement that parking space state is changed.
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing and a specific embodiment, the present invention is described in further detail.Description is below only one for example, and the solution of the present invention is not limited to this example.
With reference to figure 1-Fig. 2, Fig. 1 is the process flow diagram of the parking space state decision method based on many parking stalls geomagnetism detecting according to an embodiment of the invention.Fig. 2 is the detail flowchart of the parking space state decision method based on many parking stalls geomagnetism detecting according to an embodiment of the invention.
At step S110 place, gather the geomagnetic data of each parking stall in a plurality of parking stalls.
A plurality of geomagnetic sensors can be set in parking lot, with the geomagnetic data in certain limit around detection geomagnetic sensor, and this geomagnetic data detecting of periodically sampling, and geomagnetic data is reported to cloud processing platform, by cloud processing platform, collect/gather the geomagnetic data in the data that report, and this geomagnetic data is done to further processing.Further, the data relevant to parking stall can be stored in cloud processing platform.The data relevant to parking stall can comprise: geomagnetic data that the quantity of parking position and each car bit position, each parking stall geomagnetic sensor information, adjacent parking stall numbering, each parking stall are detected each time etc.
Wherein, this geomagnetic data can be geomagnetic field intensity.Further, because being subject to the impact of vehicle motor, terrestrial magnetic field can produce certain variation, can in each parking stall, will for measuring the geomagnetic sensor of geomagnetic data, imbed the position of the relatively more close engine in this parking stall in advance, by the geomagnetic sensor in parking stall, detect the geomagnetic data of this parking stall.So, the sensing range of this geomagnetic sensor at least comprises a parking stall.The parking stall geomagnetic sensor that is as shown in Figure 3 one embodiment of the invention arranges schematic diagram.
This step S110 can be corresponding to the step S210-S230 in Fig. 2.
At step S210 place, initialization is for adjudicating the relevant data of the parking space state of each parking stall.
Geomagnetic sensor can detect geomagnetic data, and before this, cloud end for process can be first to carrying out initialization for the data of judgement (judgement) parking space state in the data relevant to parking stall cloudlike processing platform.
For adjudicating the data of parking space state, can comprise: benchmark geomagnetic data, judgement cycle T, the adjacent parking stall numbering K adjacent with this parking stall, detection threshold min_th, current parking space state state, arranges and detects zone bit flag=0, judgement start time T
0, etc.Wherein:
Benchmark geomagnetic data, for weighing the variable quantity of the geomagnetic data detecting, and judges according to this variable quantity whether the parking space state of this parking stall changes.For example: the geomagnetic data detecting and this benchmark geomagnetic data can be carried out to difference computing, and then can obtain the variable quantity of geomagnetic data.Wherein, the present invention preferably can be by the front geomagnetic data X in this parking stall detecting
lastas benchmark geomagnetic data.Certainly, also can be using the mean value of the geomagnetic data of this parking stall repeated detection as benchmark geomagnetic data.
Judgement cycle T, for representing a time period, define to gather the time period of magnetic data in multiple times, in order to utilize the magnetic data in multiple times gathering to judge whether parking space state change has occurred.
K is numbered in adjacent parking stall, refers to the numbering of the parking stall adjacent with this parking stall.Can be numbered for each parking stall in parking lot, with the numbering of parking stall, replace (expression) this parking stall, to the parking stall in parking lot is managed.The parking stall adjacent with this parking stall can be 2 parking stalls adjacent with this left and right, parking stall, if this parking stall is edge in a plurality of parking stalls, adjacent parking stall quantity can be 1, if this parking stall in without adjacent car bit position, the quantity of the adjacent parking stall of this parking stall is 0.
Whether detection threshold min_th, reached for differentiating the variable quantity of the geomagnetic data of parking stall the degree that parking space state is changed, and can arrange according to practical application scene.Further, can be by regulating the size of detection threshold min_th to delimit the boundary that geomagnetic data that variety classes vehicle can cause changes, as compact car, in-between car, large car etc.
Current parking space state state, can include car, without car two states, for representing that the current parking space state in this parking stall is to have car state or without car state.
Detect zone bit flag, can be for controlling the parking space state judgement flow process that whether starts this parking stall.That is, controlling the variable quantity that whether variable quantity of the geomagnetic data of this parking stall is adjacent to the geomagnetic data of parking stall compares.For example, when flag=0, do not start judgement flow process; When flag=1, start judgement flow process.
Judgement start time T
0, can be the moment that starts judgement flow process, further, can be when the variable quantity of the geomagnetic data of this parking stall is greater than detection threshold, the moment of this geomagnetic data of sampling.
In step S220 place, the sampled data that locality Magnetic Sensor reports.
Geomagnetic sensor can be to cloud processing platform reported data, and cloud processing platform can receive the data that these report.These can comprise in the data of offering on geomagnetic sensor: sampled data and geomagnetic sensor and cloud processing platform other data for communicating by letter relevant.Thus, at cloud processing platform, can collect the sampled data in the data that geomagnetic sensor reports.Wherein, in this sampled data, can comprise: geomagnetic sensor detects the geomagnetic data that (sampling) arrives, the sampling time (constantly) while sampling this geomagnetic data, etc.Timestamp when this sampling time can be this geomagnetic data of sampling.
Cloud processing platform can be analyzed the reported data receiving.If the reported data receiving comprises sampled data (being judged as "Yes"), can enter step S230, if this reported data is not (being judged as "No") that comprises sampled data, the reported data continuing receiving judges, waits for sampled data.
At step S230 place, cloud processing platform records sampled data.Geomagnetic data in this sampled data can be expressed as to sampled value X
c, the sampling time in this sampled data is expressed as to T
c.
At step S120 place, the geomagnetic data of a plurality of parking stalls based on gathering, processes the geomagnetic data of this parking stall, to determine whether the variable quantity of the geomagnetic data of this parking stall reaches the degree that parking space state is changed.Particularly, cloud processing platform can, for the geomagnetic data gathering, carry out the detailed process of parking space state decision method as shown in Figure 2, as shown in step S240-step S280.
At step S240 place, judgement detects the state of zone bit, according to the state that detects zone bit, determines the mode of processing sampled data.
Can set in advance the state that zone bit flag comprises that detects, this state comprise start to the judgement flow process of this parking stall parking space state (as, flag=1), to the sampled data having gathered carry out rough handling (as, flag=0).
Can determine the operational processes that the geomagnetic data to gathering carries out according to the current state (flag=0 or flag=1) that detects zone bit flag.When judgement, this detects zone bit flag=0,0 state by this flag, the geomagnetic data gathering is analyzed, can enter step S250, the sampled data having gathered is carried out to rough handling, for example, the variable quantity of geomagnetic data and detection threshold min_th are compared, to judge whether the variable quantity of this parking stall geomagnetic data exceeds detection threshold min_th, etc.When this detects zone bit flag=1 when judgement, by 1 state of this flag, can enter the processing of judgement flow process, as first entered step S270, that is, the time of the sampled data locality reporting from Magnetic Sensor be carried out to timing.
Such as, when detecting zone bit flag=0, enter step S250
At step S250 place, judge whether the variable quantity of this parking stall geomagnetic data surpasses detection threshold min_th.
When detection zone bit flag=0 is judged as "Yes", the geomagnetic data of this parking stall is carried out to rough handling.When the variable quantity of geomagnetic data does not exceed detection threshold min_th (, no), return to step S220, continue locality magnetic data.And when the variable quantity of geomagnetic data exceeds detection threshold min_th (, be), detection zone bit flag is set to 1, when geomagnetic data does not exceed detection threshold min_th (, no), can return to step S220, continue the sampled data that locality Magnetic Sensor reports; But and then, when this detects zone bit flag=1, and the variable quantity of the geomagnetic data of this parking stall continues to be again greater than detection threshold min_th, and surpass in time while adjudicating cycle T, represent that change may occur parking space state, can compare the geomagnetic data gathering and the geomagnetic data of adjacent parking stall, which with the judgement variation of parking space state that has been the real appearance in parking stall, thereby avoid changing the variation (as the judgement flow process that enters step S270) of the parking space state causing because environmental factor causes the geomagnetic data of this parking stall with this.
Wherein, with benchmark geomagnetic data, weigh the variable quantity of this geomagnetic data, according to this variable quantity, can do further processing, for example, judge whether changing of parking space state.The variable quantity that the absolute value of difference that can be between benchmark geomagnetic data and geomagnetic data is geomagnetic data as this, compares this variable quantity and detection threshold min_th, according to comparative result, just determines the content of next step.
Particularly, can set in advance a less detection threshold min_th.When benchmark geomagnetic data is the front geomagnetic data X in this parking stall
lasttime, can be by the previous geomagnetic data X in this parking stall
lastthe geomagnetic data current with this parking stall is (as this sampled value X receiving
c) compare, to obtain the previous geomagnetic data X in this parking stall
lastand the difference (variable quantity) between this geomagnetic data of this parking stall, judges according to the difference obtaining whether the variable quantity of this parking stall geomagnetic data has surpassed detection threshold min_th.
For example, when the parking space state when this parking stall remains " having car state " or " without car state ", the variation of the geomagnetic data in this parking stall is very little so, so the previous geomagnetic data X in this parking stall
lastwith this geomagnetic data (sampled value X of this parking stall
c) between variation can be very not large yet, so, X
lastand X
cdifference can not be greater than min_th.Contrary, when this parking space state changes, in parking stall, geomagnetic data changes greatly, can cause so the previous geomagnetic data X in this parking stall
lastwith this geomagnetic data (sampled value X of this parking stall
c) between variation also very large, so, X
lastand X
cdifference can be greater than min_th.Utilize formula | X
c-X
last| > min_th, i.e. this sampled value X
c(geomagnetic data) and a front geomagnetic data X
lastthe absolute value of difference, carry out size contrast with detection threshold min_th, judge whether the geomagnetic data variable quantity of this parking stall has exceeded detection threshold min_th.
If parking stall geomagnetic data changes while exceeding detection threshold min_th, be judged as "Yes", i.e. the absolute value of the difference of the geomagnetic data of twice collection is greater than detection threshold min_th, | X
c-X
last| > min_th, the parking space state of this parking stall may change, and enters step S260.Otherwise, if this parking stall geomagnetic data changes while being less than or equal to detection threshold min_th, be judged as "No", | X
c-X
last|≤min_th, the parking space state of this parking stall does not change, and can return to step S220, continues to gather sampled data.
At step S260 place, reset and detect zone bit flag and judgement start time T
0.
If this parking stall geomagnetic data changes while exceeding detection threshold min_th, | X
c-X
last| > min_th, may there is change in the parking space state of this parking stall, can reset the detection flag flag of this parking stall, as, arrange and detect zone bit flag=1, the judgement flow process of startup to the parking space state of this parking stall, and can reset judgement start time T
0, the sampling time T of this collection is set
cfor judgement start time T
0, adjudicate start time T
0=sampling time T
c.
Particularly, it may be because environmental factor causes that the variation of the geomagnetic data of this parking stall exceeds detection threshold min_th, as, there is vehicle process, cause moment geomagnetic data variation to exceed detection threshold min_th.At this moment, can be by the geomagnetic data of this parking stall is carried out to multi collect, to judge more accurately whether the geomagnetic data variation of this parking stall is caused by environmental factor.Flag can be set to 1 so, represent that the situation that this parking stall has had the variable quantity of geomagnetic data to exceed detection threshold min_th occurs.To adjudicate start time T
0be set to this sampling time T
c(time of this sampling), be illustrated in this sampling time T
cafterwards, in judgement cycle T, need to gather a plurality of sampled datas, that is, return to step S220 Resurvey sampled data.
At step S270 place, judgement sampling time T
cwith judgement start time T
0between the time interval whether be greater than judgement cycle T.
When detecting zone bit flag=1, first judge the sampling time T in this sampled data
cwith judgement start time T
0between the time interval whether be greater than judgement cycle T.Can utilize formula | T
c-T
0|>=T, judges this sampling time T
cwith judgement start time T
0between mistiming (time interval) whether be greater than judgement cycle T.
If | T
c-T
0|>=T, sampling time T
cwith judgement start time T
0the absolute value of difference be more than or equal to judgement cycle T, be judged as "Yes", represented to have preserved a plurality of geomagnetic datas of this parking stall gathering, can enter step S280, these a plurality of geomagnetic datas are further processed.In other words, when the sampled value of the parking stall gathering surpasses detection threshold, within the judgement cycle, the sampled value of one or more these parking stalls of continuous acquisition.
If | T
c-T
0| < T, sampling time T
cwith judgement start time T
0the absolute value of difference be less than judgement cycle T, be judged as "No", the time that represents the geomagnetic data of this parking stall of collection does not also reach judgement cycle T, can continue to gather the geomagnetic data of this parking stall, when the geomagnetic data of the geomagnetic data of this parking stall and adjacent parking stall is compared with assurance, there is abundant geomagnetic data as support.Can return to step S220 so, continue to gather sampled data.
At step S280 place, judge whether the sampling average of this parking stall is greater than sampling average thresholding, and reset detection zone bit.
Can obtain a plurality of sampled values (geomagnetic data) X of this parking stall in judgement cycle T
c, based on the plurality of sampled value X
ccalculate the sampling average Δ X of this parking stall, wherein, the mean value that sampling average is one or more sampled values.
Can be by the sampling average Δ X of this parking stall and default sampling average threshold delta X
limcompare, wherein, sampling average threshold delta X
limcan be for judgement in judgement cycle T, the whether most of detection threshold min_th that surpasses of the geomagnetic data of this parking stall.
When the sampling average Δ X of this parking stall is greater than default sampling average threshold delta X
limtime, a plurality of geomagnetic datas that represent this parking stall of collection have substantially all surpassed detection threshold min_th, the parking space state of this parking stall may change, and at this moment can enter step S290, to the geomagnetic data of the geomagnetic data of this parking stall and adjacent parking stall is compared.
When the sampling average Δ X of this parking stall is less than or equal to default sampling average threshold delta X
limtime, a plurality of geomagnetic datas of this parking stall represent gathering only have and have surpassed individually detection threshold min_th, and the parking space state of this parking stall does not change, and can return to step S220 so, and by the sampling average Δ X of this parking stall, replaces sampling average threshold delta X
lim, that is, and Δ X
lim=Δ X.
Further, at this step S280 place, can reset detecting zone bit flag, as, detection zone bit flag is set to 0, to after the parking space state judgement judgement of this parking stall, can continue the geomagnetic data of collection and detection threshold min_th to compare.
At step S130 place, according to the geomagnetic data of one or more adjacent parking stalls, whether the parking space state of adjudicating this parking stall changes.
At step S290 place, obtain the sampling average of one or more adjacent parking stalls of this parking stall.
The geomagnetic sensor of this parking stall and the one or more geomagnetic sensors adjacent with this parking stall when entering Shi， parking stall, parking stall geomagnetic data around, vehicle can change, so all the variation of geomagnetic data can be detected.
In one embodiment, can by the geomagnetic data of one or more adjacent parking stalls (comprising this parking stall) respectively with without geomagnetic data constantly of car (as, according to practical situations default one without car geomagnetic data constantly) compare, by and without the corresponding parking stall of geomagnetic data of difference maximum between car geomagnetic data constantly, be determined with vehicles while passing.The parking space state that can effectively avoid the geomagnetic data of adjacent parking stall to change this parking stall causing by the method is judged by accident.
In another embodiment, can obtain in judgement cycle T one or more sampled value X of this parking stall
cand one or more sampled value X of each adjacent parking stall in one or more adjacent parking stall K
c, wherein K can be the numbering of adjacent parking stall.Sampling average and one or more adjacent parking stall sampling average based on obtaining this parking stall, wherein, sampling average is the mean value of one or more sampled values (geomagnetic data).
Can by this parking stall in judgement the one or more sampled value X in cycle T
cbe expressed as X
last[m], wherein m is greater than zero integer, can represent with Δ X the sampling average of this parking stall.
One or more sampled values in judgement cycle T of one or more adjacent parking stalls can be expressed as to X
nb_last[k] [n], wherein k is the numbering of adjacent parking stall and is to be greater than zero integer, n is greater than zero integer, and can use Δ X
nb[k] represents the sampling average of adjacent parking stall K.For example:
X
last[m]，m＝0，1，2，......，M；
X
nb_last[k][n]，k＝1，2，......，K；n＝0，1，2，......，N；
At step S300 place, the sampling average of the sampling average of this parking stall and one or more adjacent parking stalls is compared, to determine whether the parking space state of this parking stall change has occurred.
By Δ X and Δ X
nb[k] compares, if Δ X is greater than Δ X
nb[k], illustrates that parking space state variation has occurred in this parking stall, judgment result is that "Yes", can enter step S300, to further process.If Δ X is less than or equal to Δ X
nb[k], illustrates that the parking space state of this parking stall does not change, and the geomagnetic data of this parking stall changes that the GEOMAGNETIC CHANGE that is due to adjacent parking stall causes, judgment result is that "No", can return to step S220, continue to gather sampled data, with the situation of change of real-time monitoring parking space state.
When the parking space state of parking stall changes, by the sampling average Δ X of this parking stall, replace sampling average threshold delta X
lim, that is, and Δ X
lim=Δ X.
Can from the database of cloud processing platform, obtain this parking stall, these GEOMAGNETIC CHANGE data Δ X, the Δ X of adjacent parking stall K in judgement cycle T
nb[k] etc.
At step S310 place, the current parking space state state of this parking stall is upgraded.
Wherein, current parking space state can include car state and without car state, can indicate car state with state=1, and state=0 indicates without car state.
If judge this parking stall, there is parking space state variation, can upgrade according to the current parking space state state of this parking stall the parking space state of this parking stall.For example, when state=0, state is updated to state=1; When state=1, state is updated to state=0.
Complete to current parking space state renewal, can return to step S220 and continue the parking stall geomagnetic field intensity of collection to carry out determination and analysis, to find that in time the parking space state of a certain parking stall changes.
According to method of the present invention, the variable quantity of the variable quantity of this parking stall geomagnetic data and adjacent parking stall geomagnetic data is compared, to determine whether the parking space state of this parking stall changes, by the method, can reduce the impact that cause Dui Zhe parking stall, adjacent parking stall, reduce the generation of the misjudgment phenomenon that parking lack of standardization causes.And can, by regulating detection threshold min_th to detect the stop of various vehicles, as compact car, in-between car, large car etc., and then reduce and fail to judge and misjudge.
The present invention also provides a kind of parking space state judgment device based on many parking stalls geomagnetism detecting.
This device can comprise: for gathering the module of the geomagnetic data of each parking stall, a plurality of parking stall.When the sampled value of the parking stall gathering surpasses detection threshold, within the judgement cycle, the sampled value of the one or more described parking stalls of continuous acquisition.Described sampled value comprises geomagnetic data.The operating process of this module can refer step S110.
In one embodiment, for gathering the module of the geomagnetic data of each parking stall, a plurality of parking stall, can comprise: for initialization for adjudicating the module of relevant data of the parking space state of each parking stall.The course of work of this module can refer step S210.
In one embodiment, for gathering the module of the geomagnetic data of each parking stall, a plurality of parking stall, can comprise: for the module of the sampled data that locality Magnetic Sensor reports.The course of work of this module can refer step S220.
In one embodiment, for gathering the module of the geomagnetic data of each parking stall, a plurality of parking stall, can comprise: for recording the module of sampled data.The course of work of this module can refer step S230.
Device of the present invention can also comprise: for the geomagnetic data of a plurality of parking stalls based on gathering, the geomagnetic data of this parking stall is processed, to determine whether the variable quantity of the geomagnetic data of this parking stall reaches the module that makes the degree that parking space state changes.The course of work of this module can refer step S120.
In one embodiment, geomagnetic data for a plurality of parking stalls based on gathering, geomagnetic data to this parking stall is processed, to determine whether the variable quantity of the geomagnetic data of this parking stall reaches the module that makes the degree that parking space state changes, can also comprise: for judging the state that detects zone bit, according to the state that detects zone bit, determine the module of the mode of processing sampled data.
In one embodiment, geomagnetic data for a plurality of parking stalls based on gathering, geomagnetic data to this parking stall is processed, to determine whether the variable quantity of the geomagnetic data of this parking stall reaches the module that makes the degree that parking space state changes, can also comprise: for judging whether the variable quantity of this parking stall geomagnetic data surpasses the module of detection threshold min_th, and the operating process of this module can refer step S250.
In one embodiment, geomagnetic data for a plurality of parking stalls based on gathering, geomagnetic data to this parking stall is processed, to determine that whether the variable quantity of the geomagnetic data of this parking stall reaches the module that makes the degree that parking space state changes, and can also comprise: detect zone bit flag and judgement start time T for resetting
0module, the operating process of this module can refer step S260.
In one embodiment, geomagnetic data for a plurality of parking stalls based on gathering, geomagnetic data to this parking stall is processed, to determine that whether the variable quantity of the geomagnetic data of this parking stall reaches the module that makes the degree that parking space state changes, and can also comprise: for judging sampling time T
cwith judgement start time T
0between the time interval whether be greater than judgement cycle T module, the operating process of this module can refer step S270.
In one embodiment, geomagnetic data for a plurality of parking stalls based on gathering, geomagnetic data to this parking stall is processed, to determine whether the variable quantity of the geomagnetic data of this parking stall reaches the module that makes the degree that parking space state changes, can also comprise: for judging whether the sampling average of this parking stall is greater than sampling average thresholding, and reset the module that detects zone bit, the operating process of this module can refer step S280.
Device described in the application, can also comprise: while being greater than sampling average thresholding for the sampling average of one or more sampled values of the parking stall when gathering within the judgement cycle, obtain the module of sampling average of one or more adjacent parking stalls of parking stall.Described sampling average is the mean value of one or more geomagnetic datas.The operating process of this module can refer step S290.
Device described in the application, can also comprise: for the sampling average of the sampling average of parking stall and one or more adjacent parking stalls is compared, to determine whether the parking space state of parking stall the module changing has occurred.Further, when this module can be greater than the sampling average of one or more adjacent parking stalls in the sampling average when parking stall, judge that the parking space state of parking stall changes.The operating process of this module can refer step S300.
Device described in the application, can also comprise: while changing for the parking space state when parking stall, according to the current parking space state of parking stall, upgrade the module of the parking space state of this parking stall.The operating process of this module can refer step S310.
The foregoing is only embodiments of the invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in claim scope of the present invention.
Claims (10)
1. the parking space state decision method based on many parking stalls geomagnetism detecting, is characterized in that, comprising:
When the sampling average of one or more sampled values of the parking stall gathering is greater than sampling average thresholding, obtain the sampling average of one or more adjacent parking stalls of described parking stall within the judgement cycle;
The sampling average of the sampling average of described parking stall and described one or more adjacent parking stalls is compared, to determine whether the parking space state of described parking stall change has occurred.
2. method according to claim 1, is characterized in that, described sampled value comprises geomagnetic data; Described sampling average is the mean value of one or more described geomagnetic datas.
3. method according to claim 1, is characterized in that, also comprises:
When the sampled value of the parking stall gathering surpasses detection threshold, within the judgement cycle, the sampled value of the one or more described parking stalls of continuous acquisition.
4. method according to claim 1, is characterized in that, the sampling average of the sampling average of described parking stall and described one or more adjacent parking stalls is compared, to determine that whether the parking space state of described parking stall change has occurred, and comprising:
When the sampling average of described parking stall is greater than the sampling average of described one or more adjacent parking stalls, judge that the parking space state of described parking stall changes.
5. method according to claim 4, is characterized in that, also comprises:
When the parking space state of described parking stall changes, according to the current parking space state of described parking stall, upgrade the parking space state of described parking stall.
6. the parking space state judgment device based on many parking stalls geomagnetism detecting, is characterized in that, comprising:
For the sampling average when one or more sampled values of the parking stall gathering within the judgement cycle, be greater than while sampling average thresholding, obtain the module of sampling average of one or more adjacent parking stalls of described parking stall;
For the sampling average of the sampling average of described parking stall and described one or more adjacent parking stalls is compared, to determine whether the parking space state of described parking stall the module changing has occurred.
7. device according to claim 6, is characterized in that, described sampled value comprises geomagnetic data; Described sampling average is the mean value of one or more described geomagnetic datas.
8. device according to claim 6, is characterized in that, also comprises:
For the sampled value of the parking stall when gathering during over detection threshold, within the judgement cycle, the module of the sampled value of the one or more described parking stalls of continuous acquisition.
9. device according to claim 6, is characterized in that, for the sampling average of the sampling average of described parking stall and described one or more adjacent parking stalls is compared, to determine that whether the parking space state of described parking stall the module changing has occurred, and comprising:
When the sampling average of described parking stall is greater than the sampling average of described one or more adjacent parking stalls, judge that the parking space state of described parking stall changes.
10. device according to claim 9, is characterized in that, also comprises:
For when the parking space state of described parking stall changes, according to the current parking space state of described parking stall, upgrade the module of the parking space state of described parking stall.
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